Silver reacts with the air and oxidize over time creating the tarnished black look. A quick and easy way to clean it is to put a piece of aluminum foil in hot water with salt. Put the silverware or jewelry into the pot and as soon as it touch the aluminum foil, it turns silver and shinny immediately. Then rinse the item in a clean bowl of salt water again and dry. You are now ready to use it.
The key is the proportion of salt to hot water. According to the video, you should use 200 cc hot water to 40 gram salt. It is approximately 1 cup of water with 2 teaspoon of salt.
